Helmet rail



FIG. 1 is a top, front, right side perspective view of a helmet rail showing our new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a front elevation view thereof; and,

FIG. 7 is a bottom, front, right side perspective view thereof.

The dash-dash broken lines represent portions of the helmet rail that form no part of the claimed design. The dot-dash broken lines represent boundaries of the claimed design and form no part of the claimed design. 

CLAIM The ornamental design for a helmet rail, as shown and described. 